<template>
  <div>
       <!-- 面包屑导航区 -->
     <el-breadcrumb separator-class="el-icon-arrow-right">
         <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
         <el-breadcrumb-item>权限管理</el-breadcrumb-item>
         <el-breadcrumb-item>角色列表</el-breadcrumb-item>
     </el-breadcrumb>
  
  <!-- 卡片视图 -->
  <el-card>
      <!-- 添加角色按钮区 -->
      <el-row>
          <el-col>
              <el-button type='primary' class='btn'>添加角色</el-button>
          </el-col>
      </el-row>

      <!-- 角色列表 -->
       <el-card>
         <el-table :data='rolelist' border stripe>
             <!-- 展开列 -->
             <el-table-column type='expand'>
                 <template v-slot='scope'>
                     <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                         <!-- 渲染一级权限 -->
                         <el-col :span='5'>
                             <el-tag closable @close='removeRightById(scope.row,item1.id)'>{{item1.authName}}</el-tag>
                             <i class='el-icon-caret-right'></i>
                         </el-col>
                         <!-- 渲染二级和三级权限 -->
                         <el-col :span='19'>
                             <!-- 通过for循环嵌套渲染二级权限 -->
                             <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                 <!-- 二级权限 -->
                                 <el-col :span='6'>
                                     <el-tag type='success' closable @close='removeRightById(scope.row,item2.id)'>{{item2.authName}}</el-tag>
                                     <i class='el-icon-caret-right'></i>
                                 </el-col>
                                 <el-col :span='18'>
                                <!-- 渲染三级权限 -->
                                <el-tag type='warning'v-for="(item3,i3) in item2.children" :key="item3.id" closable @close='removeRightById(scope.row,item3.id)'>{{item3.authName}}</el-tag>
                                 </el-col>
                             </el-row>
                         </el-col>
                     </el-row>
                 </template>
             </el-table-column>
             <!-- 索引列 -->
             <el-table-column label='#'type='index'></el-table-column>
             <el-table-column label='角色名称' prop='roleName'></el-table-column>
             <el-table-column label='角色描述' prop='roleDesc'></el-table-column>
             <el-table-column label='操作' width='300px'>
                 <template v-slot='scope'>
                     <el-button size='mini' type="primary" icon="el-icon-edit" @click='showRolesDialog(scope.row.id)'>编辑</el-button>
                     <el-button size='mini' type="danger" icon="el-icon-delete" @click='removeRoleById(scope.row.id)'>删除</el-button>
                     <el-button size='mini' type="warning" icon="el-icon-setting" @click='showSetRightDialog(scope.row)'>分配权限</el-button>
                 </template>
             </el-table-column>
         </el-table>
     </el-card>
  </el-card>

  <!-- 修改用户的对话框 -->
<el-dialog
  title="修改角色"
  :visible.sync="rolesDialogVisible"
  width="30%"
  @close="roleDialogClosed"
  >
  <el-form 
  :model="roleForm"
  :rules="roleFormRules"
  ref="roleFormRef"
  label-width="100px">
  <el-form-item label="用户名"prop='roleName'>
    <el-input v-model="roleForm.roleName"></el-input>
  </el-form-item>
  <el-form-item label="角色描述" prop='roleDesc'>
    <el-input v-model="roleForm.roleDesc"></el-input>
  </el-form-item>
  </el-form>
  <span slot="footer" class="dialog-footer">
    <el-button @click="rolesDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editRoleInfo" >确 定</el-button>
  </span>
</el-dialog>
<!-- 分配权限的对话框 -->
<el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%"
  @close='setRightDialogClosed'
  >
  <!-- 树形控件 -->
  <el-tree 
  :data="rightList"
   :props="treeProps" 
   show-checkbox node-key='id' 
   default-expand-all 
   :default-checked-keys='defKeys'
   ref='treeRef'
   ></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights" >确 定</el-button>
  </span>
</el-dialog>

  </div>
</template>

<script>
export default {
 name:'Roles',
 data(){
     return{
        //所有角色列表数据
        rolelist:[],
        //控制角色对话框的显示与隐藏
        rolesDialogVisible:false,
        //查询到的角色信息对象
        roleForm:{
        },
        //修改角色的验证规则对象
        roleFormRules:{
            roleName:[
                { required: true, message: '请输入角色名称', trigger: 'blur' },
                {min: 2, max: 10, message: '用户名的长度在3~10个字符之间',trigger: 'blur'},
            ],
            roleDesc:[
                { required: true, message: '请输入角色描述', trigger: 'blur' },
                {min: 2, max: 10, message: '用户名的长度在3~10个字符之间',trigger: 'blur'},
            ]
        },
        //控制分配权限对话框的显示与隐藏
        setRightDialogVisible:false,
        //所有权限数据
        rightList:[],
        // 树形控件的属性绑定对象
        treeProps:{
          label:'authName',
          children:'children'
        },
        //默认选中的节点id值 数组
        defKeys:[],
        //当前即将分配权限的角色ID
        roleId:''
     }
 },
 created() {
     this.getRolesList()
 },
 methods:{
     //获取所有角色列表
   async getRolesList(){
       const {data:res}=await this.$http.get('roles')
       if(res.meta.status!==200){
           return this.$message.error('获取角色列表失败')
       }else{
           this.rolelist=res.data
       }
   },
   //展示编辑角色权限的对话框
   async showRolesDialog(id){
     console.log(id)
     const { data: res } = await this.$http.get('roles/' + id)
     console.log(res);
      if (res.meta.status!==200) {
        return this.$message.error('查询角色信息失败！')
      }
      this.roleForm = res.data
      this.rolesDialogVisible = true
   },
    //监听修改角色对话框的关闭事件
   roleDialogClosed(){
     this.$refs.roleFormRef.resetFields()
   },
   //修改角色信息并提交
   editRoleInfo(){
this.$refs.roleFormRef.validate(async valid => {
        if (!valid) return
        // 发起修改用户信息的数据请求
        const { data: res } = await this.$http.put(
          'roles/' + this.roleForm.roleId,
          {
           roleName: this.roleForm.roleName,
           roleDesc: this.roleForm.roleDesc
          }
        )
         console.log(res);
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败！')
        }
        // 关闭对话框
        this.rolesDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('更新角色信息成功！')
      })
   },
   //删除角色
   async removeRoleById(id){
     //弹框询问用户是否删除数据
     const confirmResult=await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)
        //如果用户点击删除的话返回值为字符串confirm
        //如果用户取消了删除则返回值为字符串cancel
        // console.log(confirmResult);
        if(confirmResult!='confirm'){
          return this.$message.info('已取消删除')
        }
       const {data:res}= await this.$http.delete('roles/'+id)
       if(res.meta.status!=200){
         return this.$message.error('删除用户失败!')
       }else[
         this.$message.success('删除用户成功!'),
         this.getRolesList()
       ]
   },
   //根据Id删除对应的权限
   async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }

      // this.getRolesList()
      role.children = res.data
    },
    //展示分配权限的对话框
    async showSetRightDialog(role){
      this.roleId=role.id
     //获取所有权限的数据
    const {data:res} = await this.$http.get('rights/tree')
    if(res.meta.status!==200){
      return this.$message.error('获取权限数据失败')
    }else{
      //获取到的权限数据保存到data中
      this.rightList=res.data
      console.log(this.rightList);
    }
    //递归获取三级节点的id
    this.getLeafKeys(role,this.defKeys)
     this.setRightDialogVisible=true
    },
    // 通过递归的形式获取角色下三级角色id，并保存到defkey中
    getLeafKeys(node,arr){
      //如果当前node节点不包含children，则是三级节点
      if(!node.children){
        return arr.push(node.id)
      }else{
        node.children.forEach(item=>this.getLeafKeys(item,arr))
      }
    },
    //监听权限对话框的关闭事件
    setRightDialogClosed(){
       this.defKeys=[]
    },
    //点击为角色分配权限
    async allotRights(){
     const keys=[
       ...this.$refs.treeRef.getCheckedKeys(),
       ...this.$refs.treeRef.getHalfCheckedKeys()
     ]
    const idStr=keys.join(',')
    const {data:res}=await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
    if(res.meta.status!==200){
      return this.$message.error('更新权限失败')
    }else{
      this.$message.success('更新权限成功')
      this.getRolesList()
      this.setRightDialogVisible=false
    }
    }
}
}
</script>

<style lang='less' scoped>
.btn{
    margin-bottom: 15px;
}
.el-tag{
    margin:7px
}
.bdtop{
 border-top:1px solid #ccc;
}
.bdbottom{
border-bottom:1px solid #ccc
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>